וְעָשִׂ֥יתָ בִגְדֵי־קֹ֖דֶשׁ לְאַהֲרֹ֣ן אָחִ֑יךָ לְכָב֖וֹד וּלְתִפְאָֽרֶת׃
And thou shalt make holy garments for Aaron thy brother, for splendour and for beauty.
Read kabbalistic (mystical) interpretation of Exodus 28:2: and classical mystical sources.